Portable rig for circular saws.



M. J. SEVBRSON. PORTABLE RIG FOR CIRCULAR SAWS. APPLIOATION FILED AUG.24, 1912,

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MARTIN J. SEVERSON, OF BOUNDUP, MONTANA.

PORTABLE RIG- FOR CIRCULAR SAWS.

Specification of Letters Patent.

Application filed August 24, 1912. Serial No. 716,852.

To all whom it may concern:

Be it known that I, MARTIN J. SEVERSON, a citizen of the United States,residing at Roundup, in the county of Musselshell and State of Montana,have invented a new and useful Portable Rig for Circular Saws; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to a new and useful portable rig for a circularsaw, and including means for operating the saw.

As one of the objects of the invention, a conveyance or rig is providedhaving guides, in which the carriage is vertically guided, said carriagehaving a rack, with which a manually operated device engages for movingthe carriage vertically.

Another object of the invention is the provision of a swing memberadapted to hold a log or other commodity while being severed by thecircular saw of the carriage.

The invention comprises further features and combination of parts, ashereinafter set forth, shown in the drawings and claimed.

In the drawings: Figure 1 is a view in side elevation of the improvedrigging or conveyance including the carriage constructed in accordancewith the invention. Fig. 2 is an enlarged detail view of a portion of arigging and the carriage. Fig. 3 is a detail view.

Referring more especially to the drawings 1 designates the platform of aconveyance, which is mounted upon the supporting wheels 2. Mounted onthe platform 1 is an engine 3, the pulley 1 of which has a belt 5passing thereabout. One end of the platform is provided with an uprightframe, comprising standards 6 and the braces 7. Standards 6 are curvedon the are of a circle using the center of the pulley 1 as a and areprovided with guides 8, in which the rack members 9 of the carriage 10are guided, there being anti-frictional rollers 11, to insure easyrunning of the carriage. Mounted in bearings 12 of the standards 6 is ashaft 13 having pinions 14., which engage the teeth of the racks, therebeing a crank handle 15, by which revoluble movements in one directionor the other, may be imparted to the pinions, which in turn move thecarriage vertically. To hold the cartion 18 of the carriage is a shaft19 having,

a pulley 20 at one end, and provided with a circular saw 21. Mounted insuitable bearings 22 of the racks is a shaft 23, with.

which a pulley 24: is movable. An additional pulley 25 is also mountedupon the shaft 23, and about which pulley 25 a belt 26 travels, which inturn travels about the pulley 20, whereby revoluble motion may beimparted to the shaft 19 and the saw 21. The belt 5 travels about thepulley 24:, so as to impart motion to the shaft 23, which in turnoperates the belt 26. A weighted member 27 pivoted at 28 and providedWith a pulley 29, constitutes means for holding the belt 5 tightened.The racks of the carriage are provided with overhanging arms 30, towhich the swing bars 31 are pivoted at 32. These swing bars are bracedrela tive to one another by the bar 33, and are provided with lowerhooked ends to receive a log or the like, so as to be supported whilebeing severed. By rendering the carriage adjustable, the circular sawmay be brought over or above a log or the like lying down, so as to outthe same without supporting it in the swing bars.

The invention having been set forth,what is claimed as new and useful isIn combination with a frame having saw operating means thereon, saidframe having guides, a carriage mounted in said guides, means carried bysaid frame and having devices for moving the carriage vertically, ashaft mounted in bearings of the carriage having a circular saw andprovided with connections to the saw operating means, said carriagehaving arms at its upper ends, a work holding carriage pivoted to saidarms, and elements in said guides for holding said vertically movingcarriage in cooperation with said devices.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

MARTIN J. SEVERSON.

WVitnesses:

N. D. DUsnNBnuY, P. RICHARDSON.

copies of this patent may be obtained for, five cents each, byaddressing the Commissioner of Patents, Washington, D. 6.?

Patented Dec. 8, 1914.

